Python进制转换（二进制、十进制和十六进制）

Python进制转换（二进制、十进制和十六进制）

#!/usr/bin/env python

# -*- coding: utf-8 -*-

# 2/10/16 base trans. wrote by srcdog on 20th, April, 2009

# ld elements in base 2, 10, 16.

import os,sys

# global definition

# base = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F]

base = [str(x) for x in range(10)] + [ chr(x) for x in range(ord('A'),ord('A')+6)]

# bin2dec

# 二进制 to 十进制: int(str,n=10)

def bin2dec(string_num):

return str(int(string_num, 2))

# hex2dec

# 十六进制 to 十进制

def hex2dec(string_num):

return str(int(string_num.upper(), 16))

# dec2bin

# 十进制 to 二进制: bin()

def dec2bin(string_num):

num = int(string_num)

mid = []

while True:

if num == 0: break

num,rem = divmod(num, 2)

mid.append(base[rem])

return ''.join([str(x) for x in mid[::-1]])

# dec2hex

# 十进制 to 八进制: oct()

# 十进制 to 十六进制: hex()

def dec2hex(string_num):

num = int(string_num)

mid = []

while True:

if num == 0: break

num,rem = divmod(num, 16)

mid.append(base[rem])

return ''.join([str(x) for x in mid[::-1]])

# hex2tobin

# 十六进制 to 二进制: bin(int(str,16))

def hex2bin(string_num):

return dec2bin(hex2dec(string_num.upper()))

# bin2hex

# 二进制 to 十六进制: hex(int(str,2))

def bin2hex(string_num):

return dec2hex(bin2dec(string_num))